Fish farming does not need oxygen, and different fish have different needs for oxygen. Some fish don't consume much oxygen, so changing water at ordinary times can increase dissolved oxygen without additional oxygen-increasing equipment. If some big fish are raised or the breeding density is relatively high, it may be necessary to prepare an oxygen pump to provide 2-4 hours of oxygen every day. First, can fish be raised without oxygen? Fish can be raised without oxygen. Different fish have different needs for oxygen. Some fish consume little oxygen. Usually, changing water can increase dissolved oxygen without additional oxygen-increasing equipment. If some big fish are raised or the breeding density is relatively high, it may be necessary to prepare an oxygen pump to provide 2-4 hours of oxygen every day.

Second, what fish do you need to raise without oxygen 1. Goldfish: Goldfish is a common ornamental fish, which has a long history of breeding in China and has many varieties. This kind of fish doesn't need much oxygen, so it doesn't need special oxygen-increasing equipment. Moreover, as a wide-temperature fish, it has strong adaptability to temperature, diverse feeding habits and is very easy to raise.

2. Peacock fish: Peacock fish is a common small tropical fish. Because of its small size, the demand for oxygen is not high. If the culture density is not very high, there is no need to increase oxygen. Although this kind of fish can tolerate the low temperature of 16℃, it is best to keep the temperature between 20-30℃, and it is easy to get sick if the temperature is too low.

3. Betta: Betta can be divided into China Betta and Thailand Betta, and no matter which one, oxygen is not needed. As a Diptera fish, fighting fish has an auxiliary respiratory organ. When the dissolved oxygen in the water is low, they will swim to the surface and take oxygen directly from the air.